Yeah, you can pick up a complete version (minus box) for $15 shipped on ebay right now ($10 loose).  I'm sure if you wait you can find it for closer to $10 complete around these parts, but $15 isn't unreasonable, imo.  I love the music tracks in the game, though the main track becomes repetitive after listening to it for 30+ minutes...  Great, mindless game that you can play with a friend.